Some people are testing the transparency of river water by rivers with instruments that test transparency

(nsfw:1.5),paintings, sketches, (worst quality:2), (low quality:2), (normal quality:2), lowres, skin spots, acnes, age spot, distorted finger, amputation, missing hands and fingers, extra hand and finger, doubled face, double hands, (ugly face:1.2), (crooked finger:1.3), extra legs, mutated hands, fused fingers, (too many fingers), (bare shoulders),